Spread the Cheddar cheese over the bottom of the baking dish. Top with a thin layer of macaroni. Top macaroni with Provolone cheese, another layer of macaroni, a layer of mozzarella and a third layer of macaroni. Top with a layer of Colby-Monterey Jack cheese. Pour the egg over all, followed by the milk.

Bake in the preheated oven 20 minutes, or until bubbly and golden brown.